1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <stdio.h>
#include "nsCOMPtr.h"
#include "nsIEventQueueService.h"
#include "nsIServiceManager.h"
#include "nsIStreamListener.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include <algorithm>
//#include "prthread.h"
// This test attempts to load a URL on a separate thread. It is currently
// designed simply to expose the problems inherent in such an ambitous task
// (i.e., it don't work).
// Utility functions...
// Create event queue for current thread.
static nsCOMPtr<nsIEventQueue>
createEventQueue() {
nsCOMPtr<nsIEventQueue> result;
// Get event queue service.
nsresult rv = NS_OK;
nsCOMPtr<nsIEventQueueService> eqs =
do_GetService(NS_EVENTQUEUESERVICE_CONTRACTID, &rv);
if ( NS_SUCCEEDED( rv ) ) {
eqs->GetThreadEventQueue(NS_CURRENT_THREAD, getter_AddRefs(result));
} else {
printf( "%s %d: NS_WITH_SERVICE(nsIEventQueueService) failed, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
}
return result;
}
// Create channel for requested URL.
static nsCOMPtr<nsIChannel>
createChannel( const char *url ) {
nsCOMPtr<nsIInputStream> result;
nsCOMPtr<nsIURI> uri;
printf( "Calling NS_NewURI for %s...\n", url );
nsresult rv = NS_NewURI( getter_AddRefs( uri ), url );
if ( NS_SUCCEEDED( rv ) ) {
printf( "...NS_NewURI completed OK\n" );
// Allocate a new input channel on this thread.
printf( "Calling NS_OpenURI...\n" );
nsresult rv = NS_OpenURI( getter_AddRefs( result ), uri, 0 );
if ( NS_SUCCEEDED( rv ) ) {
printf( "...NS_OpenURI completed OK\n" );
} else {
printf( "%s %d: NS_OpenURI failed, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
}
} else {
printf( "%s %d: NS_NewURI failed, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
}
return result;
}
// Test listener. It basically dumps incoming data to console.
class TestListener : public nsIStreamListener {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSISTREAMOBSERVER
TestListener();
~TestListener();
static void IOThread( void *p );
private:
bool mDone;
int mThreadNo;
FILE *mFile;
static int threadCount;
}; // class TestListener
int TestListener::threadCount = 0;
TestListener::TestListener()
: mDone( false ), mThreadNo( ++threadCount ) {
printf( "TestListener ctor called on thread %d\n", mThreadNo );
}
TestListener::~TestListener() {
printf( "TestListener dtor called on thread %d\n", mThreadNo );
}
NS_IMPL_ISUPPORTS2( TestListener, nsIStreamListener, nsIRequestObserver )
NS_IMETHODIMP
TestListener::OnStartRequest( nsIChannel *aChannel, nsISupports *aContext ) {
nsresult rv = NS_OK;
printf( "TestListener::OnStartRequest called on thread %d\n", mThreadNo );
// Open output file.
char fileName[32];
sprintf( fileName, "%s%d", "thread", mThreadNo );
mFile = fopen( fileName, "wb" );
setbuf( mFile, 0 );
return rv;
}
NS_IMETHODIMP
TestListener::OnStopRequest( nsIChannel *aChannel,
nsISupports *aContext,
nsresult aStatus,
const PRUnichar *aMsg ) {
nsresult rv = NS_OK;
printf( "TestListener::OnStopRequest called on thread %d\n", mThreadNo );
fclose( mFile );
mDone = true;
return rv;
}
NS_IMETHODIMP
TestListener::OnDataAvailable( nsIChannel *aChannel,
nsISupports *aContext,
nsIInputStream *aStream,
uint64_t offset,
uint32_t aLength ) {
nsresult rv = NS_OK;
printf( "TestListener::OnDataAvailable called on thread %d\n", mThreadNo );
// Write the data to the console.
// Read a buffer full till aLength bytes have been processed.
char buffer[ 8192 ];
unsigned long bytesRemaining = aLength;
while ( bytesRemaining ) {
unsigned int bytesRead;
// Read a buffer full or the number remaining (whichever is smaller).
rv = aStream->Read( buffer,
std::min( sizeof( buffer ), bytesRemaining ),
&bytesRead );
if ( NS_SUCCEEDED( rv ) ) {
// Write the bytes just read to the output file.
fwrite( buffer, 1, bytesRead, mFile );
bytesRemaining -= bytesRead;
} else {
printf( "%s %d: Read error, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
break;
}
}
printf( "\n" );
return rv;
}
// IOThread: this function creates a new TestListener object (on the new
// thread), opens a channel, and does AsyncRead to it.
void
TestListener::IOThread( void *p ) {
printf( "I/O thread (0x%08X) started...\n", (int)(void*)PR_GetCurrentThread() );
// Argument is pointer to the nsIEventQueue for the main thread.
nsIEventQueue *mainThreadQ = static_cast<nsIEventQueue*>(p);
// Create channel for random web page.
nsCOMPtr<nsIChannel> channel = createChannel( (const char*)p );
if ( channel ) {
// Create event queue.
nsCOMPtr<nsIEventQueue> ioEventQ = createEventQueue();
if ( ioEventQ ) {
// Create test listener.
TestListener *testListener = new TestListener();
testListener->AddRef();
// Read the channel.
printf( "Doing AsyncRead...\n" );
nsresult rv = channel->AsyncRead( testListener, 0 );
if ( NS_SUCCEEDED( rv ) ) {
printf( "...AsyncRead completed OK\n" );
// Process events till testListener says stop.
printf( "Start event loop on io thread %d...\n", testListener->mThreadNo );
while ( !testListener->mDone ) {
PLEvent *event;
ioEventQ->GetEvent( &event );
ioEventQ->HandleEvent( event );
}
printf( "...io thread %d event loop exiting\n", testListener->mThreadNo );
} else {
printf( "%s %d: AsyncRead failed on thread %d, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, testListener->mThreadNo, (int)rv );
}
// Release the test listener.
testListener->Release();
}
}
printf( "...I/O thread terminating\n" );
}
static const int maxThreads = 5;
int
main( int argc, char* argv[] ) {
setbuf( stdout, 0 );
if ( argc < 2 || argc > maxThreads + 1 ) {
printf( "usage: testThreadedIO url1 <url2>...\n"
"where <url#> is a location to be loaded on a separate thread\n"
"limit is %d urls/threads", maxThreads );
return -1;
}
nsresult rv= (nsresult)-1;
printf( "Test starting...\n" );
// Initialize XPCOM.
printf( "Initializing XPCOM...\n" );
rv = NS_InitXPCOM2(nullptr, nullptr, nullptr);
if ( NS_FAILED( rv ) ) {
printf( "%s %d: NS_InitXPCOM failed, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
return rv;
}
printf( "...XPCOM initialized OK\n" );
// Create the Event Queue for this thread...
printf( "Creating event queue for main thread (0x%08X)...\n",
(int)(void*)PR_GetCurrentThread() );
{
nsCOMPtr<nsIEventQueue> mainThreadQ = createEventQueue();
if ( mainThreadQ ) {
printf( "...main thread's event queue created OK\n" );
// Spawn threads to do I/O.
int goodThreads = 0;
PRThread *thread[ maxThreads ];
for ( int threadNo = 1; threadNo < argc; threadNo++ ) {
printf( "Creating I/O thread %d to load %s...\n", threadNo, argv[threadNo] );
PRThread *ioThread = PR_CreateThread( PR_USER_THREAD,
TestListener::IOThread,
argv[threadNo],
PR_PRIORITY_NORMAL,
PR_LOCAL_THREAD,
PR_JOINABLE_THREAD,
0 );
if ( ioThread ) {
thread[ goodThreads++ ] = ioThread;
printf( "...I/O thread %d (0x%08X) created OK\n",
threadNo, (int)(void*)ioThread );
} else {
printf( "%s %d: PR_CreateThread for thread %d failed\n",
(char*)__FILE__, (int)__LINE__, threadNo );
}
}
// Wait for all the threads to terminate.
for ( int joinThread = 0; joinThread < goodThreads; joinThread++ ) {
printf( "Waiting for thread %d to terminate...\n", joinThread+1 );
PR_JoinThread( thread[ joinThread ] );
}
}
} // this scopes the nsCOMPtrs
// no nsCOMPtrs are allowed to be alive when you call NS_ShutdownXPCOM
// Shut down XPCOM.
printf( "Shutting down XPCOM...\n" );
NS_ShutdownXPCOM( 0 );
printf( "...XPCOM shutdown complete\n" );
// Exit.
printf( "...test complete, rv=0x%08X\n", (int)rv );
return rv;
}
|